Let’s look at the facts:
>we have records of at the end of the dinosaur period the evolution of increasingly specialized predatory raptors that formed groups as social hunters before rapidly going extinct along with other dinosaurs
>there was a global extinction event involving dramatic worldwide climate change marking the end of this period
>there are no records of similar scale extinction event since hundreds of millions of years earlier when some forms of complex life had not yet developed
We can see parallels in a seemingly unrelated area of natural history:
>humans formed groups of hominids acting as social hunters within the last 2 million years, modern humans with advanced intelligence did not develop until the last hundred thousand years or so, too tiny a blip in evolutionary terms to show up in the fossil record
>humans have started climate change on a scale that will drastically affect the globe
>the human extinction event is the largest since the dinosaurs and long term will result in the elimination of the vast majority of species on earth
Taking these together we have perhaps another explanation for the extinction: that social dinosaurs developed advanced intelligence and an industrial civilization causing global climate change and extinction before wiping themselves out or leaving the planet.
There should certainly be some evidence, if this is the case- the issue is, we don’t know what to look for; 65 million years is enough to compact cities down to strata of rock, and we have no knowledge of the kinds of traces that would be left behind in the fossil record from an intelligent civilization.
